Tencent Releases Hy3 Preview Model After AI Rebuild

Apr 26, 2026

Tencent released Hy3 preview in 2026, the first model from its rebuilt Hunyuan AI platform, reaching public availability in under three months after a major infrastructure overhaul in early 2026. The fast-and-slow-thinking fused MoE model features 295 billion total parameters with 21 billion activated, supports 256K context, and scored 74.4% on SWE-bench Verified, trailing Claude Opus 4.6 (80.8%) and GPT-5.4 (78.6%). Tencent deployed the model across six products including Yuanbao and Tencent Docs before launch and is offering it at RMB 1.2 per million input tokens with a two-week free access period. The company positions this as a first step to gather developer feedback while continuing to scale pre-training and reinforcement learning in parallel.

Tencent's infrastructure rebuild and accelerated development cycle

▪Tencent Hy3 preview is the first major model from Tencent's rebuilt Hunyuan pipeline.
▪Tencent rebuilt key parts of its pre-training and reinforcement-learning infrastructure in early 2026.
▪Yao Shunyu described Tencent Hy3 Preview as the first step in rebuilding the Hunyuan model line.
▪Tencent Hy3 preview reached public release in less than three months after Tencent rebuilt its AI infrastructure.

Hy3 preview's technical specifications and benchmark performance

▪Tencent Hy3 preview has been designed for complex reasoning, instruction following, in-context learning, coding and agentic workloads.
▪Tencent Hy3 preview is a fast-and-slow-thinking fused MoE language model with 295 billion total parameters.
▪Tencent Hy3 preview scored 74.4% on SWE-bench Verified.
▪Tencent Hy3 preview improves inference efficiency by 40%.
▪Claude Opus 4.6 scored 80.8% on SWE-bench Verified.
▪Tencent Hy3 preview scored 67.1% on BrowseComp.
▪Tencent Hy3 preview has 21 billion activated parameters.
▪Tencent Hy3 preview scored 54.4% on Terminal-Bench 2.0.

Product integration strategy and commercial deployment

▪Tencent Hy3 preview was deployed in Tencent Docs before public launch.
▪Yao Shunyu stated the open-source release of Tencent Hy3 Preview is intended to bring in feedback from developers and users before the official HY3 version.

Pricing model and accessibility approach

▪Tencent Hy3 preview is priced at RMB 1.2 per million input tokens through Tencent Cloud TokenHub.
▪Tencent Hy3 preview is available through Tencent Cloud's TokenHub for paid API usage.
▪Tencent Hy3 preview is available for free limited-time access at https://openrouter.ai/tencent/hy3-preview:free.

Perspective of AI developers and researchers

▪Tencent Hy3 preview offers significantly lower pricing than comparable Western AI models at RMB 1.2 per million input tokens.
▪The 295 billion parameter MoE architecture with only 21 billion activated parameters represents an efficiency-focused design approach.

Perspective of Competing AI companies

▪Hy3 preview's performance gap behind Claude Opus 4.6 and GPT-5.4 on SWE-bench Verified shows Tencent still trails leading Western models on coding tasks.